IoT & Hardware
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You're reading from  Practical Python Programming for IoT

Product typeBook
Published inNov 2020
Reading LevelIntermediate
PublisherPackt
ISBN-139781838982461
Edition1st Edition
Languages
Python
Tools
Raspberry Pi
Concepts
IoT Development
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Author (1)
Gary Smart
Gary Smart
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Gary Smart


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Building the relay driver circuit

Let's build our relay driver circuit. We will do this in three parts, starting with the placements of the components:

Figure 7.11 – Relay driver circuit (part 1 of 3)

Following are the steps for the first part of the build. The step numbers match the numbered black circles in Figure 7.11:

  1. Place the PC817 into your breadboard, taking care that pin 1 of the IC is connected to the left-hand breadboard bank as illustrated.
  2. Place a 1kΩ resistor into your breadboard. One end of the resistor connects to pin 1 of the PC817.
  3. Place the MOSFET into your breadboard, taking care to orientate the component the correct way around regarding the Source, Gate, and Drain legs. Our example layout assumes a 2N7000 MOSFET. Please see Figure 7.8 if you need help to identify the legs.
  4. Place a 1kΩ resistor into your breadboard. One end of this resistor connects the Gate leg of the MOSFET.
  5. Place a 100kΩ resistor into your breadboard...
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Practical Python Programming for IoT
Published in: Nov 2020Publisher: PacktISBN-13: 9781838982461
© 2020 Packt Publishing Limited All Rights Reserved

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